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What are replicas?
Larger earthquakes (magnitude greater than about 5) like this one are usually followed by smaller ones known as replicas that occur in the same area during the days, weeks, months or even years after the main earthquake.
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Aftershocks are usually at least an order of magnitude smaller than the main earthquake. Their size and frequency decrease over time.
What’s up with this earthquake?
Based on its magnitude, the fault that was active during the earthquake probably ruptured below a surface of approx. 3 km2 (as a first order estimate). Therefore, the length of the rift zone was probably about 3 km.
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